Surface testing machine



FIG. 1 is a front and top-right perspective view of a surface testingmachine showing our new design with the upper portions thereof in aupwardly tilted position;

FIG. 2 is a front and top-left perspective view thereof;

FIG. 3 is a top and left front perspective view thereof with the paperreceiver cover open and the upper portions in the down position;

FIG. 4 is a top and right rear perspective view of FIGS. 1 and 2.

The ornamental design for the surface testing machine, as shown anddescribed.